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Methane in California gold mines

Mining and milling practices at small gold mines

Power-shovel and dragline placer mining

Guide to prospecting for lode gold

Published Year

• 1920-1929 (1)
• 1930-1939 (2)
• 1950-1959 (1)

Subject

• Gold mines and mining (4) *
• Firedamp (1)
• Gas bursts (1)
• Gold mines and mining--California (1)
• Methane (1)
• Mine gases (1)
• Mine gases--Flammability (1)
• Mine gases--Measurement (1)
• Mine ventilation (1)
• Placer deposits (1)
• Prospecting (1)

Author

• Gardner, E. D. (4) *
• Allsman, Paul Trekell, (1)
• Clawson, Marion. (1)
• Johnson, Charles H., (1)
• Pickard, Byron O., (1)

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